Revert of Create symlink to adb in home dir right before device setup.

scripts/slave/recipes/bisection/android_bisect.expected/basic_android_nexus7_perf_bisect.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.chromium.perf",
       "--builder",
       "android_nexus7_perf_bisect",
@@ skipping 129 matching lines @@
     "cwd": "[SLAVE_BUILD]/src",
     "name": "git diff to analyze patch",
     "stdout": "/path/to/tmp/",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@files@tools/auto_bisect/bisect.cfg@@@",
       "@@@STEP_LOG_END@files@@@"
     ]
   },
   {
     "cmd": [
-      "python",
-      "-u",
-      "[SLAVE_BUILD]/src/build/symlink.py",
-      "-f",
-      "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools/adb",
-      "~/adb"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "create adb symlink"
-  },
-  {
-    "cmd": [
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/daemonizer.py",
       "--",
       "[SLAVE_BUILD]/src/build/android/adb_logcat_monitor.py",
       "[SLAVE_BUILD]/src/out/logcat"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "spawn_logcat_monitor"
@@ skipping 322 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]